I know ohms is a measure of resistance, but what does it do with subs and amps and how do u hook stuff up at different ohms. Also what does the ohms do to the sound of the sub?
2006-11-21 11:07:14 · 6 answers · asked by j1s07 2 in Cars & Transportation ➔ Car Audio
Ohms is the theretical resistance (impedance) value of the sub woofer. If you try to measure it directly with a meter it will give you a crazy resistance, but the correct AC impedance will be printed on the voice coil.
So say you have two 4ohm subs. If you wire them in series (think straight line) you would go from the + of the Amp to the + of Sub1. The - of Sub1 is the hooked to the + of Sub 2. Finally the - of Sub2 would hook into the - output of the Amp. In this configuration your Amp sees a 8ohm (4ohm + 4ohm) load. Amp output (watts) usually decreases with an increase of resistance at the load. So say your Amp is rated at 1000 watts (4ohms) it may only output 750 or 500 watts into this (8ohm) load.
On to parallel(Think railroad tracks). In this setup the + from the Amp will go to the + of Sub1 and the + of Sub2. The - from the Amp will go to the - of Sub1 and the - of Sub2. In this setup your two 4 ohm subs combine to create a 2 ohm load. ( 1/((1/4) + (1/4))) Now that same Amp that could do 1000 watts at 4 ohms (nominal) can probably do 1500 or 2000 watts with this 2 ohm load connected.
Make sure your Amp can handle a 2 ohm load. Some can, some can't....most decent sub amps can. The lower the "ohms" the less the resistance so going from 4 ohms to 2 ohms will make the amp work a bit harder (think hotter) but should be able to put out more power.
Hope this helps!!
MikeC
2006-11-21 11:28:16 · answer #1 · answered by MikeC 3 · 2⤊ 0⤋
These are dual voice coil 4-ohm subs. That means that each sub can individually be wired for a 2-ohms or 8-ohms; a pair of subs can be wired for a combined impedance of 4-ohms or 1-ohm. Each sub is rated for 1000 watts RMS, so you should look for an amplifier that can produce between 1000 and 2000 watts RMS at 1 ohm or at 4 ohms. You'll probably have an easier time finding an amp rated for this kind of power at 1 ohm. If you're looking at Hifonics amps, you should get decent results with the BXI 1608D or 1610D; or the BXI 2008D or 2010D. You could also purchase two identical amplifiers, each rated for around 1000 watts RMS at 2 ohms. A pair of Alpine MRP-M1000 amps would work, or maybe a pair of Kicker ZX1000.1 amplifiers.
2016-05-22 10:34:22 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Ohms is actually a measure or rating of IMPEDANCE when referring to amplifier output to a loudspeaker. The final output coupling from the amp is designed (or, is looking for) a certain particular impedance or load to be drawn by the speaker(s).
If you mismatch the speaker impedance to the amplifier, you will either get poor sound quality (too small of a load from higher impedance speakers) or blow out the amplifier because the load was too great (for instance, using 4-ohm spkrs with an amp rated at say, 16-ohms).
See Ohms Law to better understand what is going on here.
2006-11-21 11:19:26 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Awesome question. I was wondering that exact same thing. I think it has to do with how many watts and amps you have running in either series or parallel. Thanks for asking this because its something I would like to know the scientific reason for as well.
2006-11-21 11:14:03 · answer #4 · answered by pimp3476 1 · 0⤊ 0⤋
I suggest you contact Yahoo ID: sparky3489 He's the #1 source for all things audio... you can find him almost anywhere in the car audio section here...
PX
2006-11-21 11:16:09 · answer #5 · answered by pxhero 2 · 0⤊ 0⤋
MikeC got it pretty well.
Go here for wiring methods, enclosure types and all kinds of good info:
http://www.spkrbox1.spaces.live.com
2006-11-21 15:45:03 · answer #6 · answered by Anonymous · 0⤊ 0⤋